The Lost Ones (originally on syfy.com)
Amazon; IMDb; Wikipedia; YouTube

Based on the series Defiance. This is a series of five webisodes that streamed in 2014, between the first and second seasons of the show. Following Irisa's disappearance at the end of season one, the webisodes find Nolan looking for her in Denver, where he first rescued her from a cult 16 years ago. The story includes flashbacks to that time. By the end of the webisodes, in the present (i.e., 2047), Nolan uncovers a lead on the whereabouts of a former cult member he hopes could tell him where to find Irisa. I don't want to say anything about how he comes by this lead, but it's a decent little story.